Molding-machine.



J. A. FIELD. DECD.

J. POWELL. ADMIMSTRATOR.

MOLDING MACHINE.

APPLICATION FILED 05c. 30.1914.

Patented Dec. 17, 1918.

6 SHEETS-SHEET I.

J. A. FIELD. DEC'D.

1. POWELL. ADMINlSTRATOR.

MOLDING MACHINE.

APPLICATION FILED. 05c. 30. IBM.

Patented Dec. 17 1918.

6 SHEETSSHEET 2.

J. A. FIELD, DECD.

1. POWELL, ADMINISTRATOR.

mflfi g 7 g in dw m o an. M a 18 J. A. FIELD. DECD. J. POWELL,ADMINISTRATOR.

MOLDING MACHINE.

APPLICATION men cameo. 1914. 1,287,937 Patented Dec. 17, 1918.

s SHEETS-SHEET 4.

lag

J. A. FIELD. DECD.

J. POWELL, ADMINISTRATOR.

MOLDING MACHINE. APPLICATION FILED DEC. 30, 1914.

Patented Dec. 17, 1918.

6 SHEETS-SHEET 5 J. A. FIELD. DECD.

l. POWELL. ADMINISTRATOR.

MOLDING MACHINE.

4 APPLICATION FILED DEC. 30. 1514. 7 1,287,937, Patented Dec.17,1918.

in: mm: nix-s :u. "IBIS-Luna, Ilsulnnlou. u c

tiNrrED srarns PATENT onnrc.

JESSE A. FIELD, DECEASED, BY JAIMES POWELL, ADMINISTRATOR, OF DUNKIRK,NEW YORK, ASSIGNOR TO MELLIE E. FIELD, OF CLEVELAND, OHIO.

MOLDING-MACHIN E.

Specification of Letters Patent.

Patented Dec. 1'7, 1918.

Application filed December 30, 1914. Serial No. 879,667.

To all whom it may concern Be it known that 1, JAMES POWELL, a citizenof the United States, residing at Dunkirk, in the county of Chautauquaand State of New York, do make known that JnssE A. FIELD, late a citizenof the United States, invented a certain new and useful Improvement in hIolding-Machines, of which the following is a full, clear, and exactdescription.

This invention relates to molding machines, and is particularly adaptedto compact the sand in large shallow molds, such as are prepared forradiator castings. The machine embodies as salient features a presserdevice which progressively engages and compacts the sand in differentparts of the flask, and which presser device is intermittently andautomatically advanced into the flask at the end of each operation ofthe presser device until the desired degree of packing of the sand isobtained, at which time the presser device will be returned to itsstarting position ready to operate upon another mold.

The machine further embodies features for automatically raising thesprue former as the mold is removed from the machine, and also foradvancing the whole machine along the floor toward the sand pile as themachine is used.

Additional features of the machine will appear more in detail in thefollowing specification.

Reference should be had to the accompanying drawings forming a part ofthis specification, in which Figure 1 is a side elevation of themachine; Fig. 2 is a central longitudinal vertical sectional elevationof the machine; Fig. 3 is a top plan view of the machine; Fig. 4 is anend elevation of the machine; Fig. 5 is a sectional elevationtransversely of the machine; Fig. 6 is a sectional elevation showingparts of the machine in a certain operative position: Fig. 7 is a viewsimilar to Fig. 6 showing the machine in a different operative position;Fig. 8 is a side elevation of a cam forming part of the machine; Fig. 9is a transverse sectional elevation of the machine, and moreparticularly showing a mechanism for elevating a screw former.

The various parts of the machine are mounted upon a suitable framecomprising lower longitudinal members 1 and 2 and upper longitudinalmembers 3 and 4c. The members 1 and 2 are, adjacent their opposite ends,secured to upright members 5 and 6 and 7 and 8. There are alsotransversely extending spacing members 9, 10, 11 and 12.

A supplementary presser roller frame, which may be generally designatedat 13 is. mounted between the upright end members 5, 6, 7 and 8 bearingagainst these members, by which it is guided in its movement.

This frame comprises longitudinally extending lower members 14 and 15and longitudinally extending upper members 16 and 17. The upper andlower members at points adjacent their ends are held in spacedrelationship by transversely extending rods or members 19, 20, 21 and22.

The members 14, 15, 16 and 17 extend beyond the upright ends 5, 6, 7 and8 of the frame, and at their extending portions there are uprightmembers 23 and 2st which join the longitudinally extending members 1%and 16, and there are similar upright members and 26 which join thelongitudinally extending members 15 and 17 of the frame 13.

The members 23 and 24 are adapted to engage with the outside portions ofthe uprights 5 and 7, while the members 25 and 26 engage with theoutside portions of the upright portions 6 and 8. It will, therefore, beseen that theframe 13 is prevented from any transverse movement byengagement with the uprights 5, 6, 7 and 8, and is prevented fromendwise movement by the engagement of the members 23, 2a, 25 and 26 withthe members 5, 6, 7 and 8. The frame 13 is, however, free to move up anddown, guided by its engagement with the various members which havepreviously been mentioned.

There are transversely extending shafts 28 and 29, which are located atopposite ends of the machine, and each shaft is supported upon the mainframe of the machine in any desired manner, as for instance in the caseof the shaft 28, by brackets 30 and 31, which are secured to the uprightmembers 7 and 8, and in the case of the shaft 29 by brackets 32 and 33which are secured to the upright members 5 and 6.

A lever 34 intermediate the ends bears upon the shaft 28, and at itsouter end has pivotally secured thereto a weight 35. At its inner endthe lever is pivotally secured to an arm 36, which at its lower end isprovided with a hook which engages with the transversely extendin brace19. Similarly, at the opposite end or the machine there is a lever 37,which intermediate its ends, bears upon the shaft 29. This lever 37 isat its outer end pivotally secured to a weight 38, and the lever is atits inner end pivotally secured to an arm 39, which is lower end isprovided with a hook that engages with the transversely extending brace21. Tn the structure just described the weights 35 and 38 are to be ofsuch weight that they will little more than counterbalance the frame 13,so that under the action of the weights 35 and 38 the tendency of theframe 13 will be to assume the highest position with respect to the mainframe, of which it is capable.

Upon the shaft 28 there is a pair of spaced cams 39 and a0. These camsare of the general shape shown in Fig. 8. Co'cipcrating with cam 89 is alever 41, and cooperating with cam i0 is a lever l2. Each of theselevers is provided with a roller upon the end to reduce the friction dueto the engagement between the cam and the aforesaid lever. Levers alland T2 are adjustably mounted upon a transversely extending shaft 48,which shaft extends transversely of the frame 13. The ends of the shaftextend through the slots a l and t5, which are formed in the end members2% and 25 of the frame 13.

A lever $6 is at one end pivoted upon a supporting link 4 which link T7is pivotally mounted upon the end member of the frame 13. The lever l6engages with the under side of the shaft l3, and upon the movement ofthe lever t6 the shaft is pen mitted to have a limited amount ofmovement in the slot at. The free end of the lever T6 is by means of thespring as connected with an overhanging portion of the auxiliary frame.

The shaft t3 near its opposite ends is engaged upon the under portionthereof by a lever 49. This lever is at one end supported by a link 50,the link and the arm 4:9 being pivotally secured together. The link 50is pivotally hung from one of the side members 24s of the frame 13. Thelever 49 at its free end is by means of a spring 51 secured to anoverhanging portion of the frame 18. From the foregoing it will be seenthat the shaft will normally be held at the upper ends of the slots 4%and 45, because of the fact that the springs 48 and 51 will normallyhold the levers a6 and T9 in such position as to effect this result.However it wil be apparent. that flexibility and non-rigidity aresecured, so that when the earns 39 and push down the lever 42 and itsmated lever upon the opposite side of the frame the shaft lever 65.

may be pushed down against the action of the springs 48 and 51, if thepresser roller frame 13 is for any reason held against downwardmovement.

The shaft 29 is provided with a pair of spaced cams and 53, which aresimilar in all respects to the cams 39 and d0. These cams engage withthe ends of upright levers, one of which is shown 5 T, which levers areadj ustably carried upon the shaft 55, that is mounted in slots in sidemembers 26 of the frame 13 in the same manner as described in respect tothe shaft 43. Further, the nonrigid mounting of the shaft is similar inall respects with the mounting of the shaft a3.

The shaft 29 is provided near one end with a ratchet wheel 56, which issecured upon the shaft 29. This ratchet wheel is engaged by a pawl 5'7,which at its lower end is pivotally secured upon a lever 58. The leverat some point between its ends is supported upon, but not secured to,the shaft 29, this mounting being merely a convenient mounting withrespect to the operating mechanism. There is a spring 59, which is atits opposite ends secured to the pawl 57 and to the lever 58, so thatthe pawl is normally held against the ratchet 56. The upper end of thelever 58 lies in the path of movement of outwardly extending pins 60 and61, carried upon an annular member 62 mounted upon a shaft 63 whichforms the driving shaft for the machine, and which may receive its powerin any desired manner and from any desired source. As the member 62 isturned, the pins 60 and 61 will alternately engage with the lever 58,partially turning the same and causing the pawl 57 to operate theratchet 56. The amount of movement of the lever 58 is such that witheach engagement of a pin upon the member 62, the lever 58 will cause thepawl 57 to move the ratchet the distance of one tooth.

Uponthe shaft 28 there is also a ratchet wheel 63 This ratchet wheel isengaged by a pawl 64., which at its end is pivoted to a The lever 65 isfor convenience mounted upon the shaft 28. but has no connection withthe shaft, the shaft merelv serving as a pivoted support for the lever65. The lever 65 has a hub 65 extending therefrom, and to the hub thereis secured a post 66, which supports an overhanging Weight The weight 67is merely for the purpose of returning the pawl 6% to its originalposition after it has been moved forward in operating the machine. A baror red 68 is at one end secured to the lever 65, and at its opposite endsecured to the lever 58 near the lower end thereof. This rod 68 byconnect ing the levers 58 and 65 provides for the simultaneous operationof these levers, and consequently the simultaneous operation of thepawls 57 and 64;. Q

here 3 and d of the main frame.

The cams '39 and 40 and 52 and 53' are mounted upon their respectiveshafts to move in opposite directions, but the arrangement is such thatsimilar portions of each of the cams are simultaneously engaging withthe upright arms 41, 42, 5a and the companion arm to the arm 54;, sothat as the cams are revolved they will push down equally upon the armswith which they 00- operate, and so cause the ends of the frame 13 tomove downwardly equal amounts.

A presser roller 69 is mounted upon a transversely extending shaft 7 0.This shaft supports rollers 71 and 7 2, which are free to turn and arelocated upon opposite sides of the presser roller 69. The rollers 71 and72 are of such diameter as to fit between the transversely extendingmembers 1% and 15, 16 and 17 of the presser roller frame 13, and thereis. upon each roller 71 and 72 an inner flange which engages with theinner part of the members 14-, 15, 16 and 17. It will be apparent thatthe members 1%, 15, 16 and 17 form guides or tracks upon which therollers 71 and 72 may roll as the presser member moves back and forthalong the frame 13.

Upon the outer ends of the shaft 7 0 there are grooved pulleys 7 3 and 74. Around the pulley 7 3 there extends a cable 75, one end of which issecured to the extended end of shaft 43, while the opposite end of thecable is secured to the extending end of the shaft The cable at itscentral point is secured to the pulley 73.

The groo 'cd pulley 74L cooperates with a cable which is arranged in thesame manner as cable 75.

Upon the brackets 31 and 33 there are mounted grooved pulleys 77 and 78.These pulleys are simply idler pulleys. Extending transversely of themain frame of the machine is a shaft 79. This shaft is mounted insuitable bearings which are carried by the upper longitudinallyextending mem- The shaft 79 extends beyond the members 3 and 4, and uponthe outer overhanging portions there are mounted grooved pulleys 80 and81. The pulley 80 is adapted to receive an endless cable 82, which iswound several times around the pulley 80, and then is caused to passaround the idler pulleys 77 and 78, then several times around thegrooved pulley 73. The cable 82 at a point substantially midnay of theportion of the cable between idler pulleys 7 7 and 78 is secured topulley 80. and at a similar point is also secured to pulley 73.

It will be seen that the cable 7 5 is wound around upon the pulley 73 soas to extend from the lower portion of the pulley 7 3, while the cable82 is so wound that it engages the upper portion of the pulley 73 andextends in opposite directions.

The cable arrangement is such that as the shaft 79 is operated, it willcause the presser roller 69 to be moved from one end of the frame 13 tothe opposite end thereof.

The shaft 79 is caused to turn first in one direction and then in theopposite direction, and the time of the reversal of turning of the shaft79 corresponds with the excursions of the presser roller 69 from end toend of the frame 13.

The mechanism for operating the shaft 79 is as follows The annularmember 62 has secured thereto one end of a lever 84, the opposite end ofwhich is free to reciprocate. The lever Set is supported between itsfree end and its pivoted end, and for the purpose I have provided agrooved portion 85 in a drum 86 which is secured upon the shaft 79. Thelever 84; has no connection with the drum 86 or with the shaft 79. It ismerely supported and guided in the grooved portion 85.

Upon the lever 84 adjacent the pivoted end is a post 87, to which issecured one end of a cable 88. The cable is wound a few times around adrum 86, and the free end of the cable is fastened to a post 89. Thiscable is at substantially its middle portion secured to the drum 86. Itwill be apparent that the construction just described will reciprocateas the member 62 is turned against the lever 84:, thereby alternatelypulling upon the opposite ends of cable 88. When one end of the cable 88is pulled, the drum 86 is caused to turn in aclockwise direc tion,while, when the opposite end of cable 88 is pulled the drum 86 will becaused to be turned in a counterclockwise direction. This then producesan alternate rotation of the shaft 79 first in one direction and then inthe opposite direction.

The whole arrangement as to the reciprocation of the lever 8%, the cableconnecting this lever with the drum 86, and the cable connecting thegrooved pulley 80 with the grooved pulley 73 are such that the prcsserroller 69 is caused to make alternate excursions to the opposite ends ofthe presser frame 13.

The grooved pulley 81 is connected to a cable which passes over idlersand connects with the grooved pulley 74C in exactly the same manner asthat which been described with respect to the pulle s 80 and 7 so that.as the shaft 79 caused to turn, forces causing the rotation of the siaft 7f), upon which the presscr roller is mounted, are applied to bothends of the shaft '70 in equal degree, and thus prevent any twisting ofthe presser roller shaft.

Transversely of the cross member 1 and 2 of the frame, there extendtracks 90 upon which there rolls a carrier or carriage 91 having a base91 adapted to receive and support a pattern plate. The carriage91 ismounted upon the wheels 92.

A will be apparent, the tracks extend outwardly from the machine, sothat the carriage carrying the flask (and pattern) may be rolled underand from beneath the frame which carries the presser roller.

Upon the platform 91 there is a flask 93, and for the purpose of holdingthe flask there may be pins 94 extending into suitable openings formedin the flask 93.

At the rear portion of the platform 91 there are upwardly extendingbrackets 94; (see Fig. 5), each of which brackets at their upper endsare provided with a slot as. A false flask 95 is provided which fits theflask 93. This false flask has rearwardly extending cars 96, in whichare secured pins 97 that extend into the slots 9st. The false flask, aswill be readily seen, rests upon the flask 93, and permits sand to beheaped up within the flask.

Extending transversely of the flask 93, t have shown braces 98. Thesebraces may not be used in all types of flasts, but for certain types ofwork such radiator molding, which employ a wide and con'iparativelyshallow flask, it is necessary to b ace the sides of the flask to keepthem in alinei'ueut.

The roller 69 is provided with a transversely extending groove 69, andthe arrangement with respect to the peripheral length of the roller andthe length of the flask is such that the corner of the groove 69, asshown in Fig. 2, will be in position to just clear the end of the falseflask to which it is adjacent. As the presser roller 69 makes a movementfrom one side of the machine to the other, the surface of the rollerwill engage the sand in the flask and press it down in a manner later tobe explained. When the roller has reached the end of its pressingexcursion, the corner of the groove 69, which is toward the right handof the drawing, as shown in Fig. 2, will be adjacent what is the lefthand portion of the false flask, as shown in Fig. 2. In other words thegroove 69 will accommodate the ends of the false flask so that as thepresser roller rolls back and forth, and is lowered into the flask thegroove 69 will always register with one or the other of the ends of thefalse flask when the presser roller is in its extreme right or leftposition.

For the purpose of accommodating the cross braces 98 in the flask 98,there are provided other grooves, 69", these being corrcctly positionedupon the roller 69, so that these grooves will straddle the braces 98 asthe presser roller rolls from one end of the frame to the other. is thecams which are carried by the shafts 28 and 29 are turned, the rollerscarried at the ends of the levers which engage with these cams will bepressed down.

The particular curvature imparted to the cams which are carried by theshafts 28 and ras es? 29 will be determined in accordance with thedistances which it is desired to lower the prcsser roller for successiveoperations thereof. In the machine which is herein described the camshave been arranged, as will be seen from Fig. 8 to lower the presserroller from its normal or high position indicated at 4L0 in Fig. 8, tosucceeding lower positions represented at 40", 40, 40 and 40 that is tosay, the cam in its normal position, as shown in Fig. 2, is engaging thelevers at the part represented at 40 When the shaft has been turned thedistance of one tooth of the ratchet wheels 56 and 63, the rollers ofthe levers which engage the cams will engage with the portion marked L0and so at the next movement of the ratchet wheels, with the portion ofthe cam 40, and so on throughout the surface of the cam. It will beevident that the distances of the surfaces a0 6L0, etc., from the centerof the H111 will determine just how much the presser roller will belowered at each step in pressing the sand in the flask. It is usuallypreferable to move the roller in the first instance its greatestdistance, and to make the subsequent movements of the roller into theflask less in amount, as the same becomes compact.

The timing of the operating parts of the machine is such that the frame13 is lowered just after the presser roller passes from contact with thesand in the flask at the end of one pressing excursion of the roller andjust prior to the commencement of a succeeding rolling action of thepresser roller 69. It will be evident from the formation of the cam thatwhen the cam has made a complete revolution the frame 13 will bereturned to its uppermost position under the influence of the weights 35and 38.

In Fig. 2 the frame 13 appears in its highest position; in Fig. 6 theframe 13 is shown in its first lowered position from which it will beseen that the roller 69 is about to engage the sand in the false flask;in Fig. 7 there is shown the frame 13 in its lowermost position, and thepresser roller in position t begin its pressing action. The intermediatepositions of the frame 13 are not shown in the drawings, but it will beunderstood that the frame assumes intermediate positions as the camscarried by the shafts 28 and 29 are rotated.

in the drawing, more particularly in Fi 1, I have shown stops 100, whichlimit the movement of the mold carrying car 91, and properly position itbeneath the presser roller 69. If desired, these may be omitted orotherwise disposed, and the tracks extending from both sides of theframe of the machine be left open so that a car carrying a flask may bemoved beneath the machine from one side, while a car is being removedfrom beneath the presser roller on the other side, thus providing forcontinuous operation of the machine.

In Fig. 9 there is shown an arrangement of elements, which willautomatically raise the sprue former as the car 91 with its mold ismoved from beneath the presser roller.

Near the end of the flask there is an open,-., ing through the platform91 which accommodates the downwardly extending rod 101 I of a sprueformer 102. The car carries a guide 103 which guides the lower end ofthe sprue former.

Pivoted upon one of the lower side members of the frame of the moldingmachine is a lever generally represented at 104:. This lever is pivoted,as indicated at 105, a portion of the lever extending transversely ofthe machine, and another portion of the lever extending outside of andbeyond the machine. The portion of the lever 104, which is outside ofthe machine, i formed with a slanting surface 104 and with a straightsurface 104: near the end. The lever 10% is free to swing on its pivotin one direction, but the outer end of the lever 10% is adapted toengage a stop 106, as indicated in Fig. 9.

.Vhen the sprue former 102 is inserted in the flask and the car andflask are in the position shown at the right end of Fig. 9, sand will bedumped into the flask which will surround the sprue former and hold itin position. When the car and flask are in the position shown in dottedlines in Fig. 9, and the presser roller presses the sand in the flask,the sprue former will be shoved downwardly as the presser roller islowered into the flask; that portion of the lever 10% with which thesprue former may engage is free to move so that the sprue former maymove down as far as it may be pushed by the presser roller. When, afterthe sand in the flask is pressed, the car is moved outwardly frombeneath the present roller, the sprue former will engage with theinclined portion of the lever 104, thereby causing the sprue former tobe pushed up and permitting its ready removal from the sand in theflask.

It is desirable that machines of the char acter herein shown shall workalong the molding floor as the sand is used to make molds, in order thatthe machine shall follow the pile of sand rather than that sand bebrought to the machine. To accomplish this result, the machine isconstructed so that as the machine is operated it will propel itself byslow degrees along the floor.

In carrying out this provision, I provide on one or more of the wheelsupon which the frame is mounted a ratchet wheel 1.07. Upon the shaftwhich carries the wheel and ratchet wheel, a bell crank 108 may bemounted at the central portion thereof. One

arm of the bell crank carries a pawl 109 which engages with the teeth ofthe ratchet wheel 107. The other arm of the bell crank lever ispivotally connected with a rod 110, and this rod is eccentricallymounted upon a disk 111, carried upon the cam shaft 29. As the cam shaftis turned by the ratchet carried thereby, it will cause the ratchetwheel 10'? to be turned, thereby to cause the wheel axle which carriesthe cam to turn and so propel the whole machine, and obviously thearrangement may be such as to cause the machine to be advanced asrapidly or as slowly as desired.

It is believed that the operation of the machine will be obvious fromthe foregoing description. However, a brief description of thefunctioning of the machine during the making of a mold will bedescribed.

The first position of the carriage 91 and the flask carried thereby, isthat shown at the right hand of Fig. 9, it being understood that thereis a pattern secured to the platform 91 of the car 91. Sand is shoveledinto the flask and fills the flask and false flask. The car 91 is thenpushed on its tracks so as to come beneath the presser roller. At thistime the frame 13 and the presser roller 69 are in their highestpositions, as shown in Figs. 1 and 2. As the shaft 63 i turned it firstcauses the cams carried by the shafts 28 and 29 to turn to the positionshown in Fig. 6, that is to say, the presscr roller is lowered so as tobe in a position to compact the sand within the false flask. As soon asthe presser roller is lowered, the presser roller begins to turn in acounterclockwise direction and travels across the frame 13.. pressingthe sand as it travels. When the presser roller has reached its positionat the opposite end of the frame 13 to that shown in Fig. 2, the camsupon the shaft 28 and 29 are again moved, thus lowering the frame andthereupon the prcsser roller 69 is again caused to roll, this time in aclockwise direction to that end of the frame in which it is hown in Fig.

The frame 13 is successively lowered under the action of the camscarried upon the shafts 28 and 29 until in the position shown in Fig. 7,which is the lowermost position and the mold is pressed in eachposition. When the roller 69 rolls the sand in the flask, while theframe 13 is in the position shown in Fig. 7, the rolling of the moldwill be completed, and the next move ment. by the mechanism of themachine will be to turn the cams carried by the shafts 28 and 29 intothe position shown in Fig. 2, which permits the frame 13 to be elevated,due to the counterweights 35 nd 38.

The car 91 will then be moved into the position shown at the right handof Fig. 9,

which will cause the sprue former to be I levers cooperating with thecams carried by the shafts 28 and 29 are mounted, are, as will beremembered from the construction heretofore described, flexibly mountedand held by the levers d6, d7, as and 4:9. If during the operation ofthe presser roller, the sand does not readily give and compact beneaththe presser roller, so that the frame 18 cannot be moved downward by theaction of the cams carried by the shafts 2S and 29, the shafts a5 andwill cause the levers 46 and 4-7, %8 and as) to be moved against theaction of the springs engaging the outer ends of these lever Theconstruction just described af ords a flexible connect-ion, so that nodamage will be done to the machine.

It will be obvious that various changes may be made in the preciseconstruct-ion described in this specification without depart-- ing fromthe spirit of the invention.

Having thus described my invention, what I claim is 1. in a moldingmachine, the combination with a device adapted to support a flask, of apresser element adapted to successively en gage the sand in diflerentportions of the flask, and means for progressively moving the saidpresser element toward the flask after each such engagement.

2. In a molding machine, the combination with a device adapted tosupport a flask, a presser roller adapted to progressively engagedifferent portions of the sand in' the flask, and means for moving saidpresser roller progressively and intermittently toward the flask aftereach such engagement.

3. A molding machine, comprising a device adapted to support a flask, apresser roller, means for causing said presser roller to moveprogressively across the flask, and means for moving the presser rollerin intermittent steps toward the flask.

at. In a molding machine, the combinaion with a device for supportingthe flask, of a movable guiding frame, a presser member supported bysaid guiding frame, means for moving the presser member progressivelyacross the flask, and means for intermittently lowering the frame andpresser mem- & ber toward the flask.

5. in a molding machine, the combination with a device for supporting aflask, of a presser member, means *for moving said presser memberprogressively across the I},

k and in contact with the sand therein,

guiding Ifltlhfi and across the flask in conreeves"? tact with the sandtherein, and means for moving the said frame toward the flask at the endof an excursion of the presser member across the flask.

T. In a molding machine, the combination with a device for supportingthe flask, of a guiding frame above the flask, a presser member, meansfor moving said presser member to and fro in the said frame, saidpresser member moving across the flask and engaging the sand thereinupon each excursion, and means for moving the frame and presser rollertoward the flask at the end of each excursion of the presser member.

8. In a molding machine, the combination with a device for supportingthe flask, of a guiding frame supported above the flask, a presserroller guided by the said frame, means for turning said presser roller,thereby to cause it to make excursions to and fro in the uiding frame,the presser roller engaging the sand within the flask upon eachexcursion, and means for moving the guiding frame and presser rollertoward the flask at the end of each excursion of the presser roller.

9. In a molding machine, the combination with a main frame, of anauxiliary frame mounted within the main frame, a presser membersupported in the auxiliary frame, means for causing the presser memberto move to and fro in the said frame to engage the sand within theflask, and means for causing the auxiliary frame to be moved toward theflask at the end of each excursion of the presser member.

10. In a molding machine, the combination with a main frame, of anauxiliary frame slidably mounted within the main frame, a presser rollercarried by the auxiliary frame, means for causing the presser roller toturn and make excursions from end to end of the auxiliary frame,mechanism causing the auxiliary frame to be in termittently moved towardthe flask, said mechanism being operative at the time the presser rolleris at the end of an excursion.

11. In a molding machine, the combination with a main frame, of anauxiliary frame slidably mounted within. tl e main frame, a presserroller carried by the said auxiliary frame, means for causing thepresser roller to turn and make excursions from end to end of themachine, mechanism including cams which are intermittently moved tocause the aux iarjs' frame to'be lowered toward the flask.v saidmovement of the cams occurring at the time that the presser roller is atthe end of the-excursion.

combina- 12. In a molding machine, the tion with a main frame, an auxilslid-ably mounted within the mai; presser roller mounted in the frame,means for causing the presser roller to" turn and'make excursions tionwith a main frame, of an auxiliary frame slidably mounted in the mainframe, a presser roller carried by the auxiliary frame, shafts mountedat each end of the main frame, cams carried by the said shafts,

arms carried by the auxiliary frame adapted to engage with the cams,said arms being yieldingly mounted upon the auxiliary frame, mechanismfor intermittently turning the cams, said mechanism being operative atthe end of an excursion of the presser roller.

14. In a molding machine, the combination with a main frame, of anauxiliary frame slidably mounted in the main frame,

means for causing said auxiliary frame to normally lie at the upperportion of the main frame, a presser roller carried by the auxiliaryframe, means for causing said presser roller to turn and to makeexcursions to and fro in the auxiliary frame, cams carried by the mainframe, means upon the auxiliary frame which engage with the cams on themain frame, means for intermittently turning said cams, whereby theauxiliary frame is intermittently lowered toward the flask, saidmovement of the cams occurring when the presser roller is at the end ofan ex- 'cursion.

15. In a molding machine, the combina- 40 tion with a main frame, of anauxiliary frame slidably mounted in the frame, shafts mounted at theopposite ends of the main frame, cams carried by the said shafts, armscarried by the auxiliary frame and engaging the cams, ratchets carriedby the shafts upon which the cams are mounted, pawls engaging saidratchets, means connecting the said pawls whereby they operatesimultaneously, and means for operating the said pawls.

16. In a molding machine, the combination with a main frame, of anauxiliary frame slidably mounted in the main frame, a presser rollermounted in the auxiliary frame, grooved pulleys associated with theopposite ends of the presser roller, cables associated with the saidgrooved pulleys on the presser roller, and means for moving the cablesto cause the presser roller to roll from end to end of the saidauxiliary frame.

17. In a molding machine. the combination with a main frame, of anauxillary frame slidably mounted within the main frame, a presser rollermounted in the auxiliary frame, said auxiliary frame forming a guide forthe presser roller, grooved pulleys associated with the presser rollerat opposite ends thereof, grooved pulleys mounted at the upper portionof the main :lrame, cable connections between the grooved pulleys on themain frame and the grooved pulleys on the presser roller, means for turning the grooved pulleys on the main frame alternately in oppositedirections whereby the presser roller is caused to make excursions byrolling from end to end of the auxiliary frame.

18. In a molding machine, the combination with a main frame, anauxiliary frame, a presser roller mounted in the auxiliary frame andadapted to be guided by the said frame, grooved pulleys associated withthe presser roller at the opposite ends thereof, grooved pulleys carriedby the main frame cable connections between the grooved pulleys on theframe, and grooved pulleys .on the presser roller, a power shaft, acrank associated with the power shaft, a reciprocating arm pivotallyconnected withthe crank and operative connections between saidreciprocating arm and the grooved pulleys carried by the main framewhereby the grooved pulleys on the frame are rotated first in onedirection and then in the opposite direction whereby the presser rolleris turned and caused to make excursions while rolling from one end ofthe frame to the other.

19. In a molding machine, the combination with a main frame, of anauxiliary frame slidably mounted in the main frame, a presser rollercarried by the auxiliary frame, grooved pulleys carried by the presserroller adjacent opposite ends thereof, a shaft mounted at the upperportion of the main frame, grooved pulleys carried by said shaft,connections between the grooved pulleys upon the presser roller and thegrooved pulleys upon the main frame, a power shaft, a crank carried bythe power shaft, a reciprocating arm pivotally mounted upon the crank, adrum carried by the shaft upon which the grooved pulleys upon the mainframe are mounted, a cable wound upon said drum and secured at oppositeends of the reciprocating arm, and means for turning the power shaft.

20. In a molding machine the combination with a main frame of anauxiliary frame slidably mounted in the main frame, a presser rollercarried by the auxiliary frame, means for moving said'presser rollertransversely of the auxiliary frame, grooved pulleys carried at theouter end portions of the presser roller, a stationary cable coopcrating with each of said grooved pulleys whereby the presser roller iskept in alinement as it moves transversely of the auxiliary frame. A,

21. In a molding machine the combination with a main frame of anauxiliary frame slidably mounted in the main frame, a presser rollersupported by the auxiliary frame and adapted to move transversely ofsaid auxiliary frame, a grooved pulley adjacent each end of the presserroller, a stationary cable cooperating with each of said grooved pulleysto keep the presser roller in alinement as it moves across the frame, amovable cable associated with each of said grooved pulleys, the movementof the last mentioned cable causing the presser roller to movetransversely of the frame.

22. In a molding machine the combination with a main frame of anauxiliary frame carried by the main frame and slid-ably mounted therein,a. compressor member carried by the auxiliary frame and movable in saidauxiliary frame, means for resiliently holding the auxiliary framenormally at the upper portion of the main frame and means for moving theauxiliary frame against the action of the means which holds theauxiliary frame toward the upper end of the main frame.

In a molding machine the combination with a main fame of an auxiliaryframe slidably mounted in the main frame, a presser member carried bythe auxiliary frame and movable in said auxiliary frame, means normallytending to move the auxiliary frame toward the upper part of the mainframe, and means for moving the aux iliary frame away from the upperportion of the main frame in intermittent steps.

2f. In a molding machine the combination of a main frame of an auxiliaryframe slidably mounted in the main frame, weights connected with theauxiliary frame whereby the auxiliary frame is normally urged to aposition at the upper portion of the main frame, cams carried by themain frame, means upon the auxiliary frame with which the cams cooperateand means for intermittently operating said cams, thereby to move theauxiliary frame by steps against the action of the weights.

25. In a molding machine the combination with a main frame of anauxiliary frame slidably mounted in the main frame, means for normallyurging the auxiliary frame toward the upper portion of the main frame,cams carried by the main frame, means upon the auxiliary framecooperating with said cams, a ratchet mechanism associated with saidcams, and means for intermittently operating said ratchet mechanismwhereby the auxiliary frame is moved in the main frame.

2-6. In a molding machine the combination with a main frame of anauxiliary frame slidably mounted in the main frame, means for normallyurging the auxiliary frame toward the upper part of the mainframe, camscarried by the main frame, means upon the auxiliary frame cooperatingwith the said cams, ratchet mechanism associated with the cams, a leverfor operating the ratchet mechanism, a rotatable member carried by themain frame, means for applying power to said rotatable member, saidrotatable member being provided with projections adapted to alternatelyengage the lever for operating the ratchet mechanism whereby theauxiliary frame is moved step by step in the main frame.

27. In a molding machine the combination with a main frame of anauxiliary frame slidably mounted in the main frame, a presser rollercarried by the said auxiliary frame and adapted to make excursions backand forth transversely of the auxiliary frame, means for normally urgingthe auxiliary frame toward the upper part of the main frame, means formoving said auxiliary frame intermittently away from the upper portionof the main frame, means for causing the presser roller to move in theauxiliary frame, and operating means operatively connected with themeans which causes the presser roller to move and also operativelyconnected with the means which causes the auxiliary frame tointermittently move in the main frame.

28. In a molding machine the combination with the main frame of anauxiliary frame slidably mounted in the main frame, means normallyurging the auxiliary frame toward the upper portion of the main frame, apresser roller ac apted to make excursions back and forth transverselyof the auxiliary frame, cams carried by the main frame, meanscooperating with the cams carried by the auxiliary frame, a ratchetmechanism cooperating with the eams, means for causing the presserroller to turn, a power shaft, an operating element carried by the powershaft, operative connections between said operating element, and a meanswhich causes the presser roller to turn, and operative connectionsbetween the operating element and the ratchet mechanism whereby theratchet mechanism is caused to operate.

29. In a molding machine the combination with a main frame, an auxiliaryframe slidably mounted in said main frame, a movable flask-carryingmeans adapted to be placed in the main frame beneath the auxiliaryframe, a sprue former slidably mounted in the flask, means carried bythe frame for engaging the sprue former as the flask is moved frombeneath the auxiliary frame, thereby to raise the sprue former.

30. In a molding machine the combination with a main frame, meanscarried by the main frame for pressing sand in a flask, a movablecarriage adapted to move upon the main frame beneath the sandcompressing means, a sprue former slidably supported upon the saidcarriage, and means carried by the mainframe for causing the sprueformer to be elevated as the carriage is moved from beneath the saidpressing element in the main frame.

31. In a molding machine the combination with a movable carria e adaptedto support a flask of a relatively stationary pressing means adapted topress the sand within the flask, a sprue former slidably supported bythe said movable carriage, and means adapted to engagesaid sprue formerto elevate the same as the carriage is moved from beneath the sandpressing means.

In a molding machine the Combination with a stationary sand pressingmeans of a movable carriage adapted to cooperate with the sand pressingmeans, and to support a flask, a slidable sprue former mounted upon saidcarriage and extending beneath the carriage, and a member with which thesprue former contacts to elevate the same as the carriage is moved frombeneath the sand pressing means.

33. In a molding machine the combination with a frame, a sand pressingmeans supported by the frame, a movable carriage adapted to cooperatewith the sand pressing means, tracks for guiding the said carriage, aslidable sprue former carried by the carriage and extending beneath thecarriage, and means carried by said frame adapted to engage the lowerend of the sprue former to elevate the same as the carriage is movedfrom beneath the sand pressing element.

34. In a molding machine, the combination with a device for supporting aflask, of a presser member for pressing sand in the flask, means causingthe presser member to press the sand in the flask, and means for causingintermittent relative movement between the presser member and flaskwhereby the presser member is caused to approach the flask after eachoperation of the presser member.

35; In a molding machine, the combination with a flask supportingmember, a presser member adapted to progressively engage differentportions of the sand in the flask. and means for causing intermittentrelative movement between said members, so as to cause one of saidmembers to gradually approach the other after each engagement of thepresser member above specified.

36. In a molding machine, the combination with a presser member adaptedto progressively engage different portions of the sand in a flask, andmeans for intermittently lowering the presser member.

37. In a molding machine, a flask supporting member, a presser roller,means for cansing said roller to move back and forth on the sand in theflask, and means for causing the flask supporting member and roller togradually approach each other by moving one of said membersintermittently toward the other.

38. In a molding machine, the combination with a flask supportingmember, a presser member, a guide frame supporting said presser member,means for shifting said presser member back and forth across the guideframe, and means for causing the flask supporting member and guide frameto approach each other by moving one of the same intermittently relativeto the other.

39. In a molding machine, a flask supporting member, a presser memberadapted to be moved back and forth across the flask, and means forcausing the presser member and flask supporting member to approach eachother by shifting one of said members toward the other when the pressermember is at one end of its movement across the flask.

40. In a molding machine, a flask supporting member, a guide frame for apresser member adapted to compress sand in the flask, a presser membermovable back and forth in said guide frame, and means for causing saidguide frame and flask supporting member to approach each other by movingone of the same toward the other when the presser member is at one endof its movement in the guide frame.

41. In a molding machine, a main frame, a relatively movable auxiliaryframe carried by the main frame, means normally holding the auxiliaryframe at its upper position in the main frame, a presser member carriedby said auxiliary frame, means for moving said presser member relativeto the same frame, and means for moving the auxiliary frame against theaction of the means which normally tend to hold the same in its upperposition.

42. In a molding machine, a frame, a presser member adapted to compresssand in a flask, a support for said presser member, means for causingintermittent relative movement between the frame and said support, saidmeans comprising a plurality of members carried by one of said elements,a plurality of members carried by the other of said elements andcooperating with the first named elements, and means for moving thepresser member in contact with the sand in different parts of the flaskbetween each said intermittent movement.

43. In a molding machine, a main frame, an auxiliary frame mounted inthe main frame, a presser member carried by the auxiliary frame, meansfor intermittently lowering the auxiliary frame in the main frame, saidmeans comprising cams carried by one of said frames, means carried bythe other of said frames and cooperating with the same, and means formoving the presser member in contact with the sand in different parts ofthe flask between each said intermittent movement.

44,-. In a molding machine, a main frame,

an auxiliary frame mounted in the main frame, a presser member carriedby the auxiliary frame and adapted to compress sand in a flask, meansfor intermittently lowering;

said auxiliary frame, comprising cams carried by one of said frames,means carried by the other of said frames and cooperating with the cams,means for intermittently turning said cams, and means for moving thepresser member into contact with sand in different parts of the flaskbetween each said intermittent movement.

45. Ina molding machine, a frame, a movable flask carrying, memberadapted to be moved under the frame, a sprue former slidably mounted inthe flask, and means carried by the'frame for engaging the sprue formeras said member is moved from beneath the frame whereby the sprue formerwill be elevated.

63. In a molding machine, a sand pressing "device, means for supportingand forming the bottom of a flask beneath the "pressing memes? device, aflask supported by said means said flask having an opening formed in themeans forming the bottom thereof, a sprue former mounted in said openingand slidable therein and adapted to be pressed down as the pressingdevice descends into the flask.

d7. In a molding machine, a main frame having means for supporting aflask, an auxiliary frame in the main frame and movable JAMES POWELL,Administrator of Jesse A. Field, deceased.

Witnesses A. F. Kwrs, A. JQ'HUDSON.

Copies 0;" this patent may be obtained for five cents each, byaddressing the Gommissioner e22 'f'atents, Washingten, L). G.

